they will join former president jimmy carter, bill clinton and george w. bush at a national memorial service on tuesday. >>> back here in the bay area, people began signing a memorial bo memorial book at skyline memorial park in san mateo county. you can sign the book until the end of the month. the cemetery plans to send it to mandela's family in south africa. another book of condolences will be available at san francisco city hall starting tomorrow. >>> thousands paid tribute to "fast and furious" star paul walker at the site he died at the car crash. they added items to an already large memorial in los angeles. local car clubs organized the gathering via the social media. the sheriff estimated 5,000 people attended and some even cruised by the crash site in their own sports cars. you. >>> legal trouble for hiker aaron ralston who was portrayed in the movie "127 hours." he will answer domestic violence charges in a denver courtroom after being arrested last night. ralston cutoff his forearm with a pocket knife after getting pinned by a loose boulder. >>>